Better RTK GPUS support for Ardupilot

Choosing between L1, L2, L5

  • Most RTK solutions support L1/L2.

  • When choosing GPSs for base station and rover (drone), ensure both support the same frequency bands.

    • If, for example, drone supports L1,L5 and base supports only L1; we are effectively handicapping the drone to just L1

    • RTK requires common frequency bands for performing the computation.

    • If using L1,L2 on drone and L1,L2 on base; both the bands are tracked by the drone and RTK will be able to perform at dual frequency and better performance.

Don’t yet know if L5 has a significant advantage over L1/L2 when used in combination with RTK.

Dead Reckoning Modules

  • These modules use info from other sensors (gyro, accelero, etc) to calculate position.

  • This is useful when the GPS position is difficult, eg: tunnels, parking lots.

List of GPSes

Note about Holybro and Ublox: many of the Holybro GPSes incorporate Ublox gps tech.

Name

Cost

Documentation, Compatibility

Reliability, Bands

Extra Notes

Name

Cost

Documentation, Compatibility

Reliability, Bands

Extra Notes

NEO F9P

$350

Very Good

Very Good (L1/L5)

Top of the line

You get what you pay for

ZED F9P

$129

Good

Very Good (L1/L5)

Top of the line

You get what you pay for

NEO M8P

$129-199

Very Good

Bad, L1 only

Unreliable under cloudy weather

NEO D9S

$48.85 (Prices may Vary)

Okay

Good (Untested), All L-bands

Rover Only

Less community experience

ZED F9R

$150-220

Okay

Good (Untested), L1/L2

Rover Only

PX Family (1125R, 1172R, 1122R)

$60-120

Very Bad

Untested, L1/L2/L5 Depending on model

Non existent documentation

We’ll be going in blind for these ones